Issue #9: Allow mysql_packages to be overridden.

defaults/main.yml

@@ -9,6 +9,13 @@ mysql_enabled_on_startup: yes
 # for RedHat systems (and derivatives).
 mysql_enablerepo: ""
 
+# Define a custom list of packages to install; if none provided, the default
+# package list from vars/[OS-family].yml will be used.
+# mysql_packages:
+#   - mysql
+#   - mysql-server
+#   - MySQL-python
+
 # MySQL connection settings.
 mysql_port: "3306"
 mysql_bind_address: '0.0.0.0'

tasks/main.yml

@@ -1,13 +1,21 @@
 ---
+# Include variables and define needed variables.
 - name: Include OS-specific variables.
   include_vars: "{{ ansible_os_family }}.yml"
 
+- name: Define mysql_packages.
+  set_fact:
+    mysql_packages: "{{ __mysql_packages | list }}"
+  when: mysql_packages is not defined
+
+# Setup/install tasks.
 - include: setup-RedHat.yml
   when: ansible_os_family == 'RedHat'
 
 - include: setup-Debian.yml
   when: ansible_os_family == 'Debian'
 
+# Configure MySQL.
 - include: configure.yml
 - include: secure-installation.yml
 - include: databases.yml

vars/Debian.yml

@@ -1,7 +1,7 @@
 ---
 mysql_daemon: mysql
 mysql_config_file: /etc/mysql/my.cnf
-mysql_packages:
+__mysql_packages:
   - mysql-common
   - mysql-server
   - python-mysqldb

vars/RedHat.yml

@@ -1,7 +1,7 @@
 ---
 mysql_daemon: mysqld
 mysql_config_file: /etc/my.cnf
-mysql_packages:
+__mysql_packages:
   - mysql
   - mysql-server
   - MySQL-python